New authorization API for Bitbucket accounts: When adding your Bitbucket account in Tower’s “Getting Started” wizard, we are now using an improved authorization API.
Bitbucket API framework: Interacting with Bitbucket user accounts was improved with this update.
Visual Studio Team Services and Team Foundation Server accounts: When configuring connections for remote repositories, VSTS and VSTFS accounts can now be added right from the corresponding dialogs.

More info: http://www.git-tower.com

Tower is a Git client for OS X that makes using Git easy and more efficient. Users benefit from its elegant and comprehensive interface and a feature set that lets them enjoy the full power of Git.

Tower abstracts Git’s complexity in an easy-to-use interface. For example, lots of actions can be performed simply via drag-and-drop, and mistakes can be undone easily. Advanced users can increase their productivity with features like single line staging, submodule support, or the file history.